As an annual economic conference was set to begin, President Volodymyr Zelensky said Ukraine had targeted a navy base and an oil terminal in the region that includes Russia’s second-largest city. Smoke rising from the port of St. Petersburg, Russia, on Wednesday. Ukraine has been expanding a campaign of long-range strikes aimed at inflicting economic damage on Russia. Credit... Associated Press By Ivan Nechepurenko and Andrew E. Kramer, The New York Times Ivan Nechepurenko reported from St. Petersburg, Russia, and Andrew E. Kramer from Kyiv, Ukraine. June 3, 2026; Updated 8:30 a.m. ET ; see also and also Ukrainian drones on Wednesday attacked St. Petersburg, Russia’s second-largest city, on the opening day of an annual economic conference that President Vladimir V. Putin has tried to cultivate into a showcase of a modern and prosperous country. It was the second time in a month that Ukraine had struck a major Russian city before an event important to Mr. Putin, as Ky...